Automatic lock edge machine for irregular arm badge

Abstract

The utility model discloses a special-shaped arm badge automatic overlock machine, it includes frame, workstation, storage material feeding device, feeding positioning device, edge locking device and carry material device, and edge locking device includes: body, the recess with lateral wall is seted up to the body side, and sets up needle plate seat at the bottom of recess, still be equipped with needle plate on needle plate seat, and needle plate is embedded in the avoidance groove of workstation, drive arrangement, it includes the upper shaft and lower shaft who are mutually parallel and are worn in the body, install on the upper shaft and place in the body interior's upper cam, install on the lower shaft and place in the body interior and with the lower cam cooperation's lower cam, set up eccentric part in the upper shaft end, install in the end of eccentric part's glasses linkage, install on the needle head spare of glasses linkage and fix in the end of needle head spare's bent needle, and bent needle is placed in the outside of lateral wall, and is placed above needle plate, the distance between bent needle and lateral wall is greater than or equal to 10mm, and the distance between bent needle and lateral wall is as the width of the space in the bag.

Description

Technical Field

[0001] This utility model relates to the field of overlock machine technology, and specifically to an automatic overlock machine for irregularly shaped armbands. Background Technology

[0002] The current edge-binding process for products such as armbands and shoulder patches is all done manually. During manual operation, there is no precise fixed position for edge binding, resulting in poor edge uniformity and an unattractive appearance after the product is finished. Because it relies entirely on manual operation, the processing cost is high, the processing steps are cumbersome, the labor intensity is high, and the work efficiency is low, which does not meet the needs of automated production advocated by today's society.

[0003] The inventor is dedicated to developing an overlock machine to solve the aforementioned technical problems and has applied for patents, such as the fully automatic overlock machine disclosed in the invention patent with authorization announcement number CN108866843B. This fully automatic overlock machine can solve the aforementioned technical problems and achieve the following technical effects: The invention has a precise structure and strong practicality. It integrates automatic feeding, automatic overlocking, automatic thread cutting, and automatic material collection into one unit, and is a fully automated production process. It replaces the traditional manual overlocking process, greatly improves the production accuracy of the product, makes the edge uniformity of the processed product excellent, and ensures the consistency of product quality. It can also reduce labor intensity, effectively improve production efficiency, reduce processing costs, and has strong market competitiveness.

[0004] During the continuous development of the overlock machine, the inventors discovered the following problems: The overlock head of the aforementioned fully automatic overlock machine uses a straight needle for sewing and overlocking. However, for armbands and shoulder patches that are thicker or made of denser and harder materials, the straight needle cannot directly pass through them. Or, after passing through the armbands and shoulder patches that are thicker or made of denser and harder materials, the stitching thread on the straight needle is also prone to breakage. Furthermore, for some irregularly shaped armbands and shoulder patches with more prominent parts, a larger rotation space is required during the overlocking process. However, the inner space of the current overlock machine head is relatively small, causing irregularly shaped armbands and shoulder patches with more prominent parts to bend and rotate during the rotation process. This requires manual bending of the edges of the irregularly shaped armbands and shoulder patches, otherwise it will affect the overlocking quality. Moreover, for irregularly shaped armbands and shoulder patches that are thicker or made of denser and harder materials with more prominent parts, bending is not possible, making it impossible to achieve the overlocking work.

[0005] In view of this, the inventors have proposed the following technical solution through continuous research and experimentation. Summary of the Invention

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an automatic edge-locking machine for shaped armbands.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An automatic edge-locking machine for irregularly shaped armbands includes a base, a worktable mounted on the base, a material storage and feeding device mounted on the base, a feeding and positioning device for transporting irregularly shaped armbands from the material storage and feeding device to the worktable and pre-positioning the armbands, an edge-locking device for edge-locking the armbands, and a material conveying device for picking up or grabbing the positioned irregularly shaped armbands and conveying them to the edge-locking device and driving the armbands to rotate to cooperate with the edge-locking device for edge-locking. The edge-locking device includes: a machine body, a groove formed on the side of the machine body, the groove having a side wall, and a bottom of the groove being... The device includes a needle plate holder, on which a needle plate is also provided, the needle plate being embedded in the clearance groove of the worktable; a drive device, comprising an upper shaft and a lower shaft passing through the body and parallel to each other, an upper cam mounted on the upper shaft and placed inside the body, a lower cam mounted on the lower shaft and placed inside the body and cooperating with the upper cam, an eccentric component disposed at the end of the upper shaft, an eyeglass linkage component mounted at the end of the eccentric component, a needle head component mounted on the eyeglass linkage component, and a bent needle fixed at the end of the needle head component, the bent needle being placed outside the side wall and above the needle plate; the distance between the bent needle and the side wall is greater than or equal to 10 mm, and the distance between the bent needle and the side wall is the width of the inner bay space of the bag.

[0008] Furthermore, in the above technical solution, the distance between the bent needle and the side wall is 15mm-25mm.

[0009] Furthermore, in the above technical solution, the sidewall is provided with a through hole, the eccentric member is inserted into the hole, and can rotate within the hole.

[0010] Furthermore, in the above technical solution, the eyeglass linkage includes a straight section and a first connecting section and a second connecting section integrally formed at both ends of the straight section; the eccentric member is provided with an eccentric column, and the first connecting section of the eyeglass linkage is sleeved on the eccentric column.

[0011] Furthermore, in the above technical solution, the needle part includes a cylindrical part, a first connecting plate integrally formed on the side of the cylindrical part and extending downward, a connecting post formed on the side of the first connecting plate, a connecting sleeve located next to the connecting post, and a spiral fastener spirally disposed on the other side of the cylindrical part opposite to the first connecting plate. The second connecting part of the eyeglass linkage is sleeved on the connecting post. The head of the curved needle is installed between the cylindrical part and the spiral fastener, and the curved needle is locked by tightening the spiral fastener.

[0012] Furthermore, in the above technical solution, the driving device further includes a driving module that is installed in conjunction with the first cam groove on the surface of the upper cam and the second cam groove on the surface of the lower cam, and an upper hook needle and a lower hook needle disposed on the driving module and in conjunction with the bent needle. The upper hook needle is located on the outer side of the side wall and above the needle plate. The upper cam has a first tooth on its rear end periphery and the lower cam has a second tooth on its rear end periphery. The first tooth and the second tooth mesh with each other, so that the upper cam and the lower cam move together.

[0013] Furthermore, in the above technical solution, the base is also provided with an operating platform, which is provided with at least a display screen, an input device, and a vision system for taking pictures of irregular armbands to determine the shape of the irregular armbands, or to determine the starting point of the edging, or to perform coordinate positioning of the irregular armbands. The base is provided with a main controller, and the vision system, the display screen, and the input device are all electrically connected to the main controller.

[0014] Furthermore, in the above technical solution, the vision system includes a CCD camera installed on the outside of the operating table and an LED light source that works in conjunction with the CCD camera. Both the LED light source and the CCD camera face the worktable. A vacuum box is provided at the lower end of the worktable, and a light-transmitting adsorption plate adapted to the vacuum box and used for adsorbing and positioning irregularly shaped armbands is provided at the upper end of the worktable. The light-transmitting adsorption plate is provided with multiple vacuum holes. An LED light strip is also provided on the inner wall of the vacuum box, and a reflector is also provided at the bottom of the vacuum box to reflect the light emitted by the LED light strips to the light-transmitting adsorption plate to achieve backlighting.

[0015] Furthermore, in the above technical solution, the material storage and feeding device includes a material storage frame for storing irregularly shaped armbands, a feeding top plate disposed in the material storage frame, and a lifting drive module for driving the feeding top plate to rise and fall.

[0016] Furthermore, in the above technical solution, the feeding and positioning device includes a frame mounted on a workbench, a rotary cylinder fixedly installed on the upper end of the frame, a swing arm mounted on the rotary cylinder and driven by the rotary cylinder to rotate, a picking cylinder installed at the end of the swing arm, a suction head installed at the lower end of the picking cylinder and driven by the picking cylinder to lift and pick up irregularly shaped armbands, a shovel mounted on the upper surface of the workbench, and a positioning cylinder for driving the shovel to move horizontally. The number of swing arms is two, which are fixed as a whole, and the material storage and feeding device has two storage units, which are equidistantly distributed on both sides of the rotary cylinder. The shovel is located on the central axis of the two material storage and feeding devices.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0018] 1. This utility model employs a curved needle that swings and inserts at an angle to sew irregularly shaped patches. This method achieves easy insertion and prevents thread breakage during sewing. Even for thicker or denser, harder irregularly shaped patches, the curved needle can easily insert and pass through, ensuring the stitching quality is maintained. Furthermore, while keeping the size of the edging device constant, the distance between the curved needle and the sidewall can be set to be greater than or equal to 10mm. This distance serves as the width of the inner bend space, increasing the edging space and allowing for sufficient rotation of protruding irregularly shaped patches. During rotation, manual bending is not required to assist in edging, allowing the patch to pass smoothly through in one go, completing the inner bend edging. This saves time and effort, improves efficiency, and gives this utility model a strong market competitiveness.

[0019] 2. This utility model adds an operating platform, a display screen, an input device, and a vision system. The vision system is used to photograph the product to determine its shape and automatically select the corresponding program to perform edge binding without manual operation. It is easy to operate and has a high degree of intelligence and automation. In addition, when the edge binding machine picks up materials for products such as armbands and shoulder patches, the vision system is used to photograph the product to locate its coordinates, enabling arbitrary material placement and accurate product positioning to ensure the quality of the edge binding in the later stages. The vision system is also used to photograph the product to determine the starting point of the edge binding, which can replace the positioning tool to ensure the beauty of the stitches and improve the quality of the product. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a perspective view of the locking device in this utility model;

[0022] Figure 3 This is an internal structural diagram of the locking device in this utility model;

[0023] Figure 4 This is a perspective view of the driving device in this utility model;

[0024] Figure 5 This is a partial exploded perspective view of the driving device in this utility model;

[0025] Figure 6 This is an assembly drawing of the bent needle in this utility model;

[0026] Figure 7 This is an assembly drawing of the fuselage in this utility model;

[0027] Figure 8 yes Figure 1 A magnified view of part A in the middle;

[0028] Figure 9 This is a partial structural diagram of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0030] See Figure 1-9 As shown, an automatic edge-locking machine for irregularly shaped armbands includes a base 1, a worktable 2 mounted on the base 1, a material storage and feeding device 3 mounted on the base 1, a feeding and positioning device 4 for transporting irregularly shaped armbands from the material storage and feeding device 3 to the worktable 2 and pre-positioning the irregularly shaped armbands, an edge-locking device 5 for edge-locking the irregularly shaped armbands, and a material conveying device 6 for picking up or grabbing the positioned irregularly shaped armbands and conveying them to the edge-locking device 5 and driving the irregularly shaped armbands to rotate in coordination with the edge-locking device 5 for edge-locking.

[0031] The base 1 is also equipped with an operating platform 11, which is equipped with at least a display screen 12, an input device 13, and a vision system 7 for taking pictures of the product to determine its shape, or to determine the starting point of the edging, or to perform coordinate positioning of the product. The base 1 is equipped with a main controller 10. The vision system 7, the display screen 12, and the input device 13 are all electrically connected to the main controller 10. After the vision system 7 takes pictures of the product, the camera software processes the photographic material to generate coordinate information and feeds it back to the main controller 10. The main controller 10 receives the data fed back by the camera software and performs corresponding action processing. This utility model adds an operating platform 11, a display screen 12, an input device 13, and a vision system 7. The vision system 7 is used to photograph the product to determine its shape and automatically select the corresponding program to perform edge binding, eliminating the need for manual operation. It is simple to operate and highly intelligent and automated. Furthermore, when the edge binding machine picks up materials for products such as armbands and shoulder patches, the vision system 7 photographs the product to determine its coordinates, enabling arbitrary material placement and accurate product positioning to ensure the quality of the subsequent edge binding. The vision system 7 also photographs the product to determine the starting point of the edge binding, replacing the needler for positioning and ensuring aesthetically pleasing stitching, thus improving product quality. The input device 13 includes at least a keyboard 131 and a mouse 132.

[0032] The storage and feeding device 3 includes a storage frame 31 for storing irregularly shaped armbands, a feeding top plate 32 disposed in the storage frame 31, and a lifting drive module 33 for driving the feeding top plate 32 to rise and fall.

[0033] The feeding and positioning device 4 includes a frame 41 mounted on the workbench 2, a rotary cylinder 42 fixedly installed on the upper end of the frame 41, a swing arm 43 mounted on the rotary cylinder 42 and driven by the rotary cylinder 42 to achieve rotation, a picking cylinder 44 installed at the end of the swing arm 43, a suction head 45 installed at the lower end of the picking cylinder 44 and driven by the picking cylinder 44 to achieve lifting and for picking up irregular armbands, a scraper 46 mounted on the upper surface of the workbench 2, and a positioning cylinder 47 for driving the scraper 46 to move horizontally.

[0034] The feeding and positioning device 4 is installed on the base 1 and is used to transport the irregularly shaped armbands sent out by the material storage and feeding device 3 to the workbench 2 and to pre-position the irregularly shaped armbands. Specifically, the feeding and positioning device 4 includes a frame 41 mounted on the workbench 2, a rotary cylinder 42 fixedly installed on the upper end of the frame 41, a swing arm 43 mounted on the rotary cylinder 42 and driven by the rotary cylinder 42 to achieve rotation, a picking cylinder 44 installed at the end of the swing arm 43, a suction head 45 installed at the lower end of the picking cylinder 44 and driven by the picking cylinder 44 to achieve lifting and picking up the irregularly shaped armbands, a scraper 46 mounted on the upper surface of the workbench 2, and a positioning cylinder 47 for driving the scraper 46 to move horizontally. During operation, the rotary cylinder 42 drives the swing arm 43 to rotate, causing the suction head 45 to move above the storage frame 31. Then, the picking cylinder 44 drives the suction head 45 to descend and pick up the irregular arm patch from the top of the storage frame 31. Next, the picking cylinder 44 drives the suction head 45 to rise, and the rotary cylinder 42 drives the swing arm 43 to rotate, causing the suction head 45 to move above the worktable 2. The picking cylinder 44 then drives the suction head 45 to descend and place the irregular arm patch on the worktable 2. Negative pressure is then generated by the vacuum hole 22 to adsorb the irregular arm patch, achieving pre-positioning. The vision system 7 then takes a picture of the irregular arm patch for positioning. In addition, the positioning cylinder 47 drives the shovel 46 to move horizontally, moving the irregular arm patch to the predetermined position, thereby achieving positioning. This achieves two different positioning methods, and only one method needs to be used in the specific implementation. The vision system 7 takes pictures to locate irregularly shaped armbands. This method can generally only locate the origin point for regular irregularly shaped armbands to perform coordinate positioning. It can replace the shovel for positioning to a certain extent, but the positioning effect is not ideal for irregularly shaped armbands. However, using the shovel 46 to push the irregularly shaped armband to the predetermined position can also achieve stable positioning for irregularly shaped armbands. In addition, this utility model uses a rotary cylinder 42 in conjunction with a swing arm 43 to move irregularly shaped armbands, which has a simpler structure, occupies less space, and is more convenient to use.

[0035] The device comprises two swing arms 43, fixed as a single unit and arranged at right angles. It also comprises two material storage and feeding devices 3, equidistantly positioned on either side of the rotary cylinder 42. The shovel 46 is located on the central axis of the two material storage and feeding devices 3. During operation, one swing arm 43, through the material-picking cylinder 44 and suction head 45, picks up a shaped arm patch from one material storage and feeding device 3 and transports it to the front of the shovel 46. Simultaneously, the other swing arm 43 rotates to drive the material-picking cylinder 44, in conjunction with the suction head 45, to move to the other material storage and feeding device 3, thereby absorbing the shaped arm patch. This process alternately transfers the shaped arm patches from the two material storage and feeding devices 3 to the front of the shovel 46.

[0036] The frame 41 is mounted above the positioning cylinder 47, and its structure is more compact and occupies less space.

[0037] The overlocking device 5 includes: a machine body 51, on the side of which a groove 510 is formed, the groove 510 having a side wall 5101, and a needle plate seat 512 provided at the bottom of the groove 510, the needle plate seat 512 also being provided with a needle plate 513, the needle plate 513 being embedded in the clearance groove 20 of the worktable 2; and a drive device 52, which includes an upper shaft 521 and a lower shaft 522 passing through the machine body 51 and parallel to each other, an upper cam 523 mounted on the upper shaft 521 and placed inside the machine body 51, and a lower cam mounted on the lower shaft 522 and placed inside the machine body 51. The upper cam 523 is coupled with a lower cam 524, an eccentric member 525 disposed at the end of the upper shaft 521, an eyeglass linkage member 526 mounted at the end of the eccentric member 525, a needle member 527 mounted on the eyeglass linkage member 526, and a bent needle 528 fixed at the end of the needle member 527. The bent needle 528 is located outside the side wall 5101 and above the needle plate 513. The distance between the bent needle 528 and the side wall 5101 is greater than or equal to 10 mm, and the distance between the bent needle 528 and the side wall 5101 is used as the width of the inner bay space of the bag. This invention utilizes a curved needle 528 that swings and inserts at an angle to sew and hem irregularly shaped patches. This achieves easy insertion and prevents thread breakage during sewing. Even for thicker or denser, harder irregularly shaped patches, the curved needle 528 easily inserts and passes through, ensuring the thread on the needle will not break, thus guaranteeing the quality of the hemming. Furthermore, this invention ensures that the hemming device is 5 feet long. Without changing the dimensions, the distance between the bent needle 528 and the side wall 5101 can be set to be greater than or equal to 10mm, and the distance between the bent needle 28 and the side wall 5101 is used as the width of the inner bay space of the bag. This increases the space for edge locking, allowing the irregularly shaped armbands that are more prominent to have sufficient space to rotate. During the rotation process, no manual bending is required to assist in edge locking, so that the irregularly shaped armbands can pass through smoothly in one go to complete the inner bay edge locking. This achieves the purpose of saving time and effort and improving efficiency, making this utility model highly competitive in the market.

[0038] The distance between the bent needle 528 and the side wall 5101 is 15mm-25mm. Furthermore, the distance between the bent needle 528 and the side wall 5101 is 19mm-22mm, such as 19mm, 19.5mm, 20mm, 20.5mm, 21mm, 22mm, etc.

[0039] The sidewall 5101 is provided with a through hole 5102, and the eccentric member 525 is inserted into the hole 5102 and can rotate within the hole 5102.

[0040] The side wall 5101 is provided with a guide plate 5103, and the guide plate 5103 is provided with a guide piece 5104 in the direction away from the side wall 5101. The guide piece 5104 is located above the needle plate 513, and the front end of the guide piece 5104 is also provided with an upwardly curved guide roll edge.

[0041] The eyeglass linkage 526 includes a straight section 5261 and a first connecting section 5262 and a second connecting section 5263 integrally formed at both ends of the straight section 5261; the eccentric member 525 is provided with an eccentric column 5251, and the first connecting section 5262 of the eyeglass linkage 526 is sleeved on the eccentric column 5251, so that when the eccentric member 525 rotates with the upper shaft 521, the eyeglass linkage 526 will rotate eccentrically relative to the upper shaft 521 through the eccentric column 5251, and the needle member 527 will realize the swinging motion.

[0042] The needle part 527 includes a column part 5271, a first connecting plate 5272 integrally formed on the side of the column part 5271 and extending downward, a connecting post 5273 formed on the side of the first connecting plate 5272, a connecting sleeve 5274 located next to the connecting post 5273, and a spiral fastener 5275 spirally disposed on the other side of the column part 5271 opposite to the first connecting plate 5272. The second connecting part 5263 of the eyeglass linkage 526 is sleeved on the connecting post 5273. The head of the curved needle 528 is installed between the column part 5271 and the spiral fastener 5275, and the curved needle 528 is locked by tightening the spiral fastener 5275.

[0043] The driving device 52 further includes a driving module 520 that is installed in conjunction with the first cam groove 5231 on the surface of the upper cam 523 and the second cam groove 5241 on the surface of the lower cam 524; an upper hook needle 5291 and a lower hook needle 5292 that are disposed on the driving module 520 and cooperate with the bent needle 528; the upper hook needle 5291 is located outside the side wall 5101 and above the needle plate 513; wherein, the rear end periphery of the upper cam 523 is provided with a first tooth, and the rear end periphery of the lower cam 524 is provided with a second tooth, the first tooth meshing with the second tooth, so that the upper cam 523 and the lower cam 524 move together.

[0044] The conveying device 6 is installed on the base 1 and is used to pick up or grab the positioned irregular arm patch and convey it to the edge-locking device 5 and drive the irregular arm patch to rotate in order to cooperate with the edge-locking device 5 to lock the edge.

[0045] The material conveying device 6 includes an XYZ three-axis drive mechanism 61, a rotating mechanism 62 mounted on the XYZ three-axis drive mechanism 61 and driven by the XYZ three-axis drive mechanism 61 to move along the XYZ three axes, and a pressure plate 63 mounted on the lower end of the rotating mechanism 62 and driven by the rotating mechanism 62 to rotate. The XYZ three-axis drive mechanism 61 drives the pressure plate 63 to press against the irregular arm patch to drive the irregular arm patch to move in the XYZ three-axis direction to realize material conveying. The rotating mechanism 62 drives the pressure plate 63 to rotate to drive the irregular arm patch to rotate, and cooperates with the XYZ three-axis drive mechanism 61 to drive it to move in the XYZ three-axis direction, thereby realizing the edge locking process of the irregular arm patch in conjunction with the edge locking device 5.

[0046] The vision system 7 includes a CCD camera 71 mounted on the outside of the operating table 11 and an LED light source 72 that cooperates with the CCD camera 71. Both the LED light source 72 and the CCD camera 71 face the worktable 2.

[0047] The LED light source 72 is ring-shaped and is distributed around the lower periphery of the CCD camera 71.

[0048] The LED light source 72 is mounted on the operating platform 11 in an adjustable relative position via a straight mounting plate 73, and extends out of the operating platform 11. The CCD camera 71 is mounted on the operating platform 11 in an adjustable relative position via an L-shaped mounting plate 74, and extends out of the operating platform 11. The L-shaped mounting plate 74 is stacked on the straight mounting plate 73, and the lower end of the CCD camera 71 extends out of the lower end of the straight mounting plate 73 through a hole in the straight mounting plate 73. The assembly structure is simple, easy to install, low in cost, and easy to debug, making it more convenient to use.

[0049] In addition, a vacuum box 21 is provided at the lower end of the workbench 2, and a light-transmitting adsorption plate 23 is provided at the upper end of the workbench 2, which is adapted to the vacuum box 21 and used to adsorb and position irregular armbands. The light-transmitting adsorption plate 23 is provided with multiple vacuum holes 22, and a vacuum adsorption area is formed between the vacuum holes 22. When the irregular armband is placed on the vacuum adsorption area, the vacuum holes 22 generate negative pressure to adsorb the irregular armband. The inner wall of the vacuum box 21 is also provided with an LED light strip 24, and the bottom of the vacuum box 21 is also provided with a reflector 25 for reflecting the light emitted by the LED light strip 24 to the light-transmitting adsorption plate 23 to achieve backlighting. When the CCD camera 71 needs to take a picture of the irregularly shaped armband that is attached and positioned on the light-transmitting suction plate 23, the LED light source 72 illuminates the front of the armband, and the reflector 25 reflects the light emitted by the LED light strip 24 back to the light-transmitting suction plate 23, making the shape of the armband clearer and ensuring the quality of the picture, so as to facilitate accurate positioning for later comparison. In other words, the light-transmitting suction plate 23 has both suction function and backlight function.

[0050] The vacuum box 21 has a support plate 211 in the middle. There is a gap between the upper end of the support plate 211 and the light-transmitting adsorption plate 23, which does not affect the adsorption function. The support plate 211 is used to install a portion of the LED light strip 24.

[0051] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An automatic edge-locking machine for irregularly shaped armbands, comprising a base (1), a worktable (2) mounted on the base (1), a material storage and feeding device (3) mounted on the base (1), a feeding and positioning device (4) for transporting irregularly shaped armbands sent from the material storage and feeding device (3) to the worktable (2) and pre-positioning the irregularly shaped armbands, an edge-locking device (5) for edge-locking the irregularly shaped armbands, and a material conveying device (6) for picking up or grabbing the positioned irregularly shaped armbands and conveying them to the edge-locking device (5) and driving the irregularly shaped armbands to rotate to cooperate with the edge-locking device (5) for edge-locking, characterized in that: The locking device (5) includes: The machine body (51) has a groove (510) on its side, the groove (510) has a side wall (5101), and a needle plate seat (512) is provided at the bottom of the groove (510). A needle plate (513) is also provided on the needle plate seat (512), and the needle plate (513) is embedded in the clearance groove (20) of the worktable (2). The drive device (52) includes an upper shaft (521) and a lower shaft (522) that pass through the body (51) and are parallel to each other, an upper cam (523) mounted on the upper shaft (521) and placed inside the body (51), a lower cam (524) mounted on the lower shaft (522) and placed inside the body (51) and cooperating with the upper cam (523), an eccentric member (525) disposed at the end of the upper shaft (521), an eyeglass linkage member (526) mounted at the end of the eccentric member (525), a needle member (527) mounted on the eyeglass linkage member (526), ​​and a bent needle (528) fixed at the end of the needle member (527). The bent needle (528) is located outside the side wall (5101) and above the needle plate (513). The distance between the bent needle (528) and the side wall (5101) is greater than or equal to 10 mm, and the distance between the bent needle (528) and the side wall (5101) is used as the width of the inner bay space of the bag.

2. The automatic overlocking machine for irregularly shaped armbands according to claim 1, characterized in that: The distance between the bent needle (528) and the side wall (5101) is 15mm-25mm.

3. The automatic overlocking machine for irregularly shaped armbands according to claim 1, characterized in that: The sidewall (5101) is provided with a through hole (5102), and the eccentric member (525) passes through the hole (5102) and can rotate within the hole (5102).

4. The automatic overlocking machine for irregularly shaped armbands according to claim 1, characterized in that: The eyeglass linkage (526) includes a straight section (5261) and a first connecting section (5262) ​​and a second connecting section (5263) integrally formed at both ends of the straight section (5261); the eccentric member (525) is provided with an eccentric column (5251), and the first connecting section (5262) ​​of the eyeglass linkage (526) is sleeved on the eccentric column (5251).

5. The automatic overlocking machine for irregularly shaped armbands according to claim 4, characterized in that: The needle part (527) includes a column part (5271), a first connecting plate (5272) integrally formed on the side of the column part (5271) and extending downward, a connecting post (5273) formed on the side of the first connecting plate (5272), a connecting sleeve (5274) located next to the connecting post (5273), and a spiral fastener (5275) spirally disposed on the other side of the column part (5271) opposite to the first connecting plate (5272). The second connecting part (5263) of the eyeglass linkage (526) is sleeved on the connecting post (5273). The head of the bent needle (528) is installed between the column part (5271) and the spiral fastener (5275), and the bent needle (528) is locked by tightening the spiral fastener (5275).

6. The automatic overlocking machine for irregularly shaped armbands according to claim 5, characterized in that: The drive device (52) further includes a drive module (520) that is installed in conjunction with the first cam groove (5231) on the surface of the upper cam (523) and the second cam groove (5241) on the surface of the lower cam (524), and an upper hook needle (5291) and a lower hook needle (5292) that are disposed on the drive module (520) and cooperate with the bent needle (528). The upper hook needle (5291) is located outside the side wall (5101) and above the needle plate (513). The upper cam (523) has a first tooth on the outer periphery of its rear end and the lower cam (524) has a second tooth on the outer periphery of its rear end. The first tooth meshes with the second tooth, so that the upper cam (523) and the lower cam (524) move together.

7. The automatic overlocking machine for irregularly shaped armbands according to any one of claims 1-6, characterized in that: The base (1) is also provided with an operating platform (11), which is provided with at least a display screen (12), an input device (13) and a vision system (7) for taking pictures of irregular armbands to determine the shape of the irregular armbands, or to determine the starting point of the edging, or to use coordinate positioning of the irregular armbands. The base (1) is provided with a main controller (10), and the vision system (7), the display screen (12) and the input device (13) are all electrically connected to the main controller (10).

8. The automatic overlocking machine for irregularly shaped armbands according to claim 7, characterized in that: The vision system (7) includes a CCD camera (71) mounted on the outside of the operating table (11) and an LED light source (72) that works in conjunction with the CCD camera (71). Both the LED light source (72) and the CCD camera (71) face the worktable (2). The workbench (2) is provided with a vacuum box (21) at the lower end, and a light-transmitting adsorption plate (23) adapted to the vacuum box (21) and used for adsorbing and positioning irregular armbands is provided at the upper end of the workbench (2). The light-transmitting adsorption plate (23) is provided with multiple vacuum holes (22). The inner wall of the vacuum box (21) is also provided with an LED light strip (24), and the bottom of the vacuum box (21) is also provided with a reflector (25) for reflecting the light emitted by the LED light strip (24) to the light-transmitting adsorption plate (23) to achieve backlighting.

9. The automatic overlocking machine for irregularly shaped armbands according to any one of claims 1-6, characterized in that: The storage and feeding device (3) includes a storage frame (31) for storing irregular armbands, a feeding top plate (32) set in the storage frame (31), and a lifting drive module for driving the feeding top plate (32) to rise and fall.

10. The automatic overlocking machine for irregularly shaped armbands according to any one of claims 1-6, characterized in that: The feeding and positioning device (4) includes a frame (41) mounted on the workbench (2), a rotary cylinder (42) fixedly installed on the upper end of the frame (41), a swing arm (43) mounted on the rotary cylinder (42) and driven by the rotary cylinder (42) to achieve rotation, a picking cylinder (44) installed at the end of the swing arm (43), and a lifting cylinder (44) installed at the lower end of the picking cylinder (44) and driven by the picking cylinder (44) to achieve lifting and for picking up materials. The suction head (45) of the irregular arm patch, the shovel (46) installed on the upper surface of the workbench (2) and the positioning cylinder (47) for driving the shovel (46) to move horizontally, wherein there are two swing arms (43) which are fixed as a whole, and the material storage and feeding device (3) has two storage devices (3) which are equidistantly distributed on both sides of the rotating cylinder (42), and the shovel (46) is located on the central axis of the two material storage and feeding devices (3).

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